Clunking sound when I hit a bump

[Badsmerf]

Funf, I have a question. How hard is it to compress the strut shaft? I've had this little rattle and replaced the lower foam piece by compressing the strut enough to slip it in before the shaft expanded again. It took some effort to push down, but seemed like it should be much stiffer. My foam pieces are fine. Replaced end links and tension arm, thinking about trying lower control arm next. Just haven't had the time for a few months.